DE102018130768A1 - Damper device for a belt means of a belt transmission - Google Patents

Abstract

The invention relates to a damper device (1) for a belt means (2) of a belt transmission (3), comprising at least the following components: - at least one sliding surface (4, 5); - a bearing surface (6) for a pivoting means (7); and- at least one carrier body (8,9), the at least one sliding surface (4,5) and the bearing surface (6) each forming part of a surface of the at least one carrier body (8,9). The damper device (1) is primarily characterized in that only the at least one carrier body (8, 9) is formed from a composite-reinforced plastic. The invention further relates to an injection molding process and a production process for producing such a damper device (1). With the slide rail proposed here, inexpensive production with high rigidity and a long achievable service life can be achieved.

Description

The invention relates to a damper device for a belt means of a belt transmission, a belt transmission with such a damper device, a drive train with such a belt transmission, a motor vehicle with such a drive train, and an injection molding method and a manufacturing method for producing such a damper device.

A belt transmission, also known as a cone pulley belt transmission or CVT (continuous variable transmission), for a drive train, for example of a motor vehicle, comprises at least one first cone pulley arranged on a first shaft and one second cone pulley arranged on a second shaft, and one for torque transmission between the belt means provided for the conical pulley pairs. A pair of conical disks comprises two conical disks which are aligned with one another with corresponding conical surfaces and are axially movable relative to one another. The (first) conical disk, also known as a loose disk or moving disk, can be moved along its shaft axis and the (second) conical disk, also known as a fixed disk, is fixed in the direction of the shaft axis. Such belt drives have been around for a long time, for example from DE 100 17 005 A1 or the WO 2014/012 741 A1 , known.

In operation of the belt transmission, the belt means is displaced in a radial direction between an inner position (small effective circle) and an outer position (large effective circle) due to the conical surfaces of the conical pulleys by means of a relative axial movement of the conical pulleys of a pair of conical pulleys. The belt means therefore runs on a changeable active circle, that is to say with a changeable running radius. As a result, a different speed ratio and torque ratio can be continuously adjusted from one pair of conical disks to the other pair of conical disks.

The belt means forms two strands between the two pairs of conical pulleys, with one of the strands forming a pull strand and the other strand a push strand or a load strand and an empty strand, depending on the configuration and the direction of rotation of the cone pulley pairs.

The direction perpendicular to the (respective) strand and pointing from the inside to the outside or vice versa is called the transverse direction. The transverse direction of the first run is therefore only parallel to the transverse direction of the second run if the running radii of the two conical disk pairs are of the same size. The direction perpendicular to the two strands and pointing from one conical disk to the other conical disk of a pair of conical disks is referred to as the axial direction. So this is a direction parallel to the axes of rotation of the conical disk pairs. The third spatial direction in the (ideal) plane of the (respective) run is referred to as the running direction or as the opposite direction or as the longitudinal direction. The running direction, transverse direction and axial direction thus span a Cartesian coordinate system that moves during operation. Although the aim is that the running direction form the ideally shortest connection between the adjacent running radii of the two conical disk pairs, in dynamic operation the orientation of the respective run can deviate from this ideally shortest connection in the short term or permanently.

In such belt drives, at least one damper device is provided in the space between the conical disk pairs. Such a damper device can be arranged on the pull strand and / or on the push strand of the belt and serves to guide and thus to limit vibrations of the belt. Such a damper device is to be designed primarily with regard to an acoustically efficient traction device guide (looping device guide). The length of the adjacent (sliding) surface for guiding the belt and the stiffness of the damper device are decisive influencing factors. A damper device is designed, for example, as a sliding shoe or as a sliding guide with a sliding surface that is only one-sided and mostly space-dependent (transverse to the belt means), that is to say arranged between the two strands. Alternatively, the damper device is designed as a slide rail with a sliding surface on both sides, that is to say both on the outside, that is to say outside of the looping circle formed, and also on the inside of the sliding surface to the relevant strand of the belting means. A sliding surface is also referred to as a contact surface or guide surface. In the case of a slide rail, the two transversely opposite slide surfaces are collectively referred to as the guide channel or slide channel.

The damper device is mounted on a pivot means with a pivot axis by means of a pivot means receptacle, whereby pivoting of the damper device about the pivot axis is made possible. In some applications, the damper device can also be moved transversely, so that the damper device follows a (steeper oval) curve which deviates from a circular path around the pivot axis. The pivot axis thus forms the center of a (two-dimensional) polar coordinate system, the (pure) Panning movement thus corresponds to the change in the polar angle and the transverse movement corresponds to the change in the polar radius. For the sake of clarity, this translational movement, which is superimposed on the swivel movement, that is to say superposed, will be disregarded below and summarized under the term swivel movement. The pivot axis is oriented transversely to the running direction of the belt, that is to say axially. This ensures that when adjusting the effective circles (running radii) of the belt transmission, the damper device can follow the resulting new (tangential) orientation of the belt means.

Damper devices are currently made of plastic, for example a low-friction polyamide. As a result of an operating temperature rise in the belt transmission, the stiffness of the slide rail drops so much that the play with the belt increases. This effect has a negative impact on the damping properties of the slide rail and thus an increasing noise emission from the belt transmission.

Proceeding from this, the present invention is based on the object of at least partially overcoming the disadvantages known from the prior art. The features according to the invention result from the independent claims, for which advantageous configurations are shown in the dependent claims. The features of the claims can be combined in any technically meaningful manner, with the explanations from the following description and features from the figures, which include supplementary embodiments of the invention, being able to be used for this purpose.

• - zumindest eine Gleitfläche;
• - eine Lagerfläche für ein Schwenkmittel; und
• - zumindest einen Trägerkörper,

wobei die zumindest eine Gleitfläche und die Lagerfläche jeweils einen Teil einer Oberfläche des zumindest einen Trägerkörpers bilden.The invention relates to a damper device for a belt means of a belt transmission, comprising at least the following components:

• - at least one sliding surface;
• - A storage area for a pivoting means; and
• - at least one support body,

wherein the at least one sliding surface and the bearing surface each form part of a surface of the at least one carrier body.

The damper device is primarily characterized in that only the at least one carrier body is formed from a composite-reinforced plastic.

In the following, reference is made to the above-mentioned co-moving spatial directions if the axial direction, transverse direction or running direction and corresponding terms are used without an explicitly different reference. Unless explicitly stated to the contrary, ordinal numbers used in the preceding and subsequent description serve only to clearly distinguish them and do not reflect the order or ranking of the components identified. An ordinal number greater than one does not necessarily mean that another such component must be present.

The damper device is designed according to the prior art for guiding or damping a belt means or at least one strand of a belt means of a belt transmission. The belt means and the belt transmission are, for example, known. The looping means is, for example, a link chain with weighing pressure pieces in a traction mechanism drive or a push link belt in a push link drive.

The damper device comprises at least one sliding surface, which is set up to bear against the belt means in an area formed as a run. Designed as a sliding guide, a single, for example transversely inner, sliding surface is provided. Designed as a slide rail, a pair of slide surfaces is provided as a slide channel transversely on both sides of the strand of the belt to be guided. So that the at least one sliding surface can be tracked according to the (target) orientation of the run to be guided, a bearing surface is provided for a pivoting means receiving the damper device. The pivoting means is often designed as a standing component, for example as a tube, and a relative movement takes place between the bearing surface and the pivoting means if the damper device follows the changed orientation of the run. The pivoting means pivotally supports the damper device and, in one embodiment, also axially at least on one side, preferably on both sides. In one embodiment, the bearing surface is (additionally) set up for axial support on a further component, for example the transmission housing of the belt transmission.

A low frictional force is desired both on the bearing surface and on the at least one sliding surface. Known damper devices are therefore made of a low-friction material, for example a polyamide.

The at least one support body is the main component of the damper device with regard to mass and volume expansion. This includes the task of holding the at least one sliding surface and the bearing surface in the geometrically desired position, as well as the associated stiffening the damper device. In one embodiment, the at least one support body has further separate elements for this purpose, for example a stiffening core, a stiffening clamp, and ribs and webs. Such a carrier body is preferably formed in one piece by means of a single shaping method, particularly preferably without separate prefabricated inserts. This makes production easier and cheaper.

For many applications, it is advantageous to design the damper device in several parts, for example in two parts, for example for simple assembly in a belt transmission. Then two or more separate carrier bodies are provided, which are connected to one another mechanically, for example in a form-fitting and / or non-positive manner, for example as a 1-click rail. In a preferred embodiment, two support bodies are provided, each of identical construction with regard to the at least one sliding surface and the bearing surface, or identical overall. The two carrier bodies preferably each have an, for example the same, proportion of the respective sliding surface and / or the bearing surface. These surfaces are formed as part of a surface of the at least one carrier body. With regard to the mass and the volume expansion, these surfaces therefore only take up a small part of the damper device. For example, the surfaces are offset from the carrier body with a layer that is just so thick that a desired surface property is reliably formed there.

The damper device is primarily characterized in that only the at least one carrier body is formed from a composite-reinforced plastic.

The use of a composite-reinforced plastic as a material for the carrier body has a number of advantages. However, a composite-reinforced plastic has a serious disadvantage, namely that a suitable composite reinforcing agent has an abrasive effect on a pivoting means and for a belt means during a relative movement, which increases the play over the service life. The pivoting movement and / or the damping effect of the damper device is thus impaired.

It must therefore be ensured that the wrapping means and the pivoting means do not come into direct contact with the composite reinforcing means over the service life, that is to say it is protected from the latter. For this purpose, the surfaces are formed as surfaces or outer layers of the relevant part of the surface of the at least one support body that are free of composite reinforcing agents. This is achieved, for example, by arranging the composite reinforcement in the final solidified state with a predetermined minimum distance from the surface.

• - kurze Fasern (kürzer als etwa 1 mm [ein Millimeter]) oder lange Fasern (länger als etwa 1 mm [ein Millimeter]), wobei lange Fasern in einer Ausführungsform aus endlosbandmaterial, beispielsweise als Rovings, gebildet sind und dann im Einsatz eine Lägen von bis zu einem Mehrfachen der Bauteilausdehnung aufweisen;
• - Kugeln;
• - textile, nicht-getränkte (nicht-imprägnierte) oder imprägnierte aber nicht final verfestigte, Halbzeuge, welche in einem späteren Schritt in die Matrix eingebettet und mittels dieser oder (etwa) gleichzeitig mit dieser Matrix final verfestigt werden;
• - Matte und/oder Vlies, also maschenbildendes oder ungerichtetes Fasermaterial;
• - Gewebe, Gelege und/oder Geflechte, also maschenfreies (oder gerichtetes) Fasermaterial; und
• - Gestricke, ebenfalls maschenfreies (oder gerichtetes) Fasermaterial.

In one embodiment, the composite reinforcing agent has at least one of the following shapes in the plastic forming the matrix of the at least one carrier body:

• short fibers (shorter than approximately 1 mm [one millimeter]) or long fibers (longer than approximately 1 mm [one millimeter]), long fibers being formed in one embodiment from endless strip material, for example as rovings, and then in use a layer have up to a multiple of the component dimension;
• - bullets;
• - Textile, non-impregnated (non-impregnated) or impregnated but not finally solidified, semi-finished products, which are embedded in the matrix in a later step and finally consolidated by means of this matrix or (approximately) simultaneously with this matrix;
• - Mat and / or fleece, ie stitch-forming or non-directional fiber material;
• - Fabrics, scrims and / or braids, i.e. mesh-free (or directional) fiber material; and
• - Knitted, also stitch-free (or directional) fiber material.

• - Kohlenstoff, beispielsweise als sogenannte Kohlefaser in einer Kunststoffmatrix als CFK [Karbonfaser-verstärkter Kunststoff];
• - Glas, beispielsweise als Glasfaser in einer Kunststoffmatrix als GFK [Glasfaser-verstärkter Kunststoff] und/oder als Glaskugel(n); und
• - Aramid, beispielsweise als Aramidfaser in einer Kunststoffmatrix.

The composite reinforcing agent is formed, for example, from at least one of the following materials:

• - Carbon, for example as so-called carbon fiber in a plastic matrix as CFRP [carbon fiber reinforced plastic];
• - Glass, for example as glass fiber in a plastic matrix as GRP [glass fiber reinforced plastic] and / or as a glass ball (s); and
• - Aramid, for example as aramid fiber in a plastic matrix.

The composite reinforcement means thus has no resilient or no shape and is only set up to absorb forces after it has been incorporated into the plastic of the at least one support body forming the matrix.

• - eine Erhöhung der Steifigkeit;
• - eine Verringerung der Temperaturabhängigkeit der Kanalhöhe bei einer Gleitschiene, also dem Abstand zwischen den paarigen Gleitflächen einer Gleitschiene; und
• - eine Verringerung der Dauer, um ein Spritzwerkzeug zum Serienzustand zu bringen, weil die Schrumpfung infolge des verringerten Volumens von (Matrix-) Kunststoff abnimmt und/oder zudem an kritischen Stellen mittels geeigneter Positionierung des Verbund-Verstärkungsmittels eine Schrumpfung infolge von Kapillareffekten (beispielsweise Fasertränkung) bei dem Verbund-Verstärkungsmittel verringert ist; und
• - eine erhöhte Formstabilität während Serienfertigung.

Advantages of a carrier body made of a composite-reinforced plastic include:

• - an increase in stiffness;
• - A reduction in the temperature dependence of the channel height in a slide rail, that is, the distance between the pair of sliding surfaces of a slide rail; and
• - a reduction in the time required to bring an injection mold into series production because the shrinkage decreases as a result of the reduced volume of (matrix) plastic and / or shrinkage as a result of capillary effects (for example fiber impregnation) at suitable points by means of suitable positioning of the composite reinforcing agent the composite reinforcing agent is reduced; and
• - increased dimensional stability during series production.

It should be pointed out that in one embodiment the separate layers are each different from one another, for example the sliding surfaces and the bearing surface have different materials and / or surface properties. For a reduced manufacturing effort, all separate layers are connected to the carrier body with the same material and / or with the same type of connection.

It is further proposed in an advantageous embodiment of the damper device that the at least one carrier body is formed from a composite reinforced plastic,
wherein the at least one sliding surface and / or the bearing surface are each formed from a separate layer.

According to this embodiment, only the carrier body is formed from a composite-reinforced plastic, while the relevant sliding surface (s) and / or the bearing surface are formed from a separate layer. The relevant sliding surface and / or bearing surface have different material properties and / or surface properties from the carrier body. For example, the hardness of the separate layer is reduced compared to the carrier body, so that the wear remains within a predetermined range over the life of the damper device and / or the belt means, preferably no or only negligible wear occurs on the belt means.

According to one embodiment, at least one of the separate layers is formed without composite reinforcement. This ensures that no composite reinforcing agent protrudes from the surface of the relevant sliding surface (s) and / or bearing surface and thus no composite reinforcing agent comes into direct contact with the strand to be guided. In addition, if the relevant separate layer is damaged, no composite reinforcing agent is exposed to the run. In this context, composite reinforcement agent-free means that the layer is free of fibers, spheres and particles, at least those composite reinforcement agents which have a greater hardness than the plastic [matrix] embedding them. This ensures that the hardness of the layer is not greater than that of the matrix plastic used. However, additives are not meant here as composite reinforcing agents, for example (small) particles and / or embedded or integrated plastics. Additives generally change the overall properties of the plastic of the layer in question compared to a pure plastic, but not in a macroscopic manner. Additives in the surface and damage do not change the hardness or the abrasion effect on the run to be run. The additives are therefore selected such that they are, at least almost, homogeneously embedded or incorporated and are compatible with the desired abrasion property. At this point it should be pointed out that there are surface properties with low friction and high hardness at the same time, as well as surface properties with low hardness and high friction.

• - als ein Schritt eines Mehr-Komponenten-Spritzgussverfahrenes, wobei in einer gemeinsamen Spritzgussform in einem anderen Schritt der zumindest eine Trägerkörper erzeugt ist;
• - als Beschichtung auf den zumindest einen gebildeten Trägerkörper; und
• - als separates Bauteil, welches mit dem zumindest einen Trägerkörper mechanisch verbunden ist.

It is further proposed in an advantageous embodiment of the damper device that the respective separate layer is generated using one of the following methods:

• as a step of a multi-component injection molding process, the at least one carrier body being produced in a common injection mold in another step;
• - As a coating on the at least one carrier body formed; and
• - As a separate component which is mechanically connected to the at least one carrier body.

For example, for (at least) a separate layer applied in certain areas, a multi-component injection molding process is advantageous, for example a 2-component injection molding process [two-component injection molding process], because it enables a damper device or half of a damper device to be used quickly and with only a single injection molding tool [die or injection mold] can be produced. In a two-component injection molding process, two extruders are provided, which inject the thermoplastic material, for example already provided with a composite reinforcing agent, with a time delay or simultaneously into the injection mold. For example, the at least one separate layer is injected in regions and then the carrier body with the composite reinforcing agent is injected. Alternatively, the sequence is reversed or the injection of the different materials overlaps. In one embodiment, at least one other material is in another area desired, so that further extruders are provided for this in a corresponding number.

According to one embodiment, at least one injection channel or sprue channel is formed in the previously formed carrier body, through which the material for at least one of the separate layers is or has been introduced.

For some applications it is advantageous to provide the entire carrier body with a coating. It is then advantageous, for example, to coat the prefabricated carrier body in an immersion bath, for example galvanically, or to spray it.

In one embodiment, it is advantageous to provide the carrier body and the at least one separate layer as prefabricated components which are connected to one another in a subsequent production step. For example, the layer is held as a disk material. The layer component is, for example, non-positively, for example riveted, or integrally, for example welded or glued, to the carrier body. In the case of riveting, the rivets are preferably arranged outside the sliding surface (s) and / or bearing surface, for example over a corner. In one embodiment, the layered component has connecting elements which can be positively connected to the carrier body, for example by being clicked on. In one embodiment, a corresponding damper device is designed in several parts in such a way that two or more carrier bodies are provided and one component is provided for at least one separate layer for all carrier bodies in each case, for example connecting them to one another. For example, a layer of the inner sliding surface is formed from a single separate component which is connected to two carrier bodies or connects the two carrier bodies to one another.

It is further proposed in an advantageous embodiment of the damper device that the separate layer is formed from a low-friction, preferably self-lubricating material.

The separate layer is designed with low friction, so that good damping, i.e. a tight fit on the strand to be guided, is possible with high efficiency. In one embodiment, this is achieved by means of self-lubrication, for example by means of PTFE [polytetrafluoroethylene]. As an alternative or in addition, a low roughness is formed, for example by means of a PA [polyamide], it being possible for a polyamide to be designed with a suitable low surface hardness.

According to one embodiment, the separate layer has a thickness corresponding to wear wear over a predetermined service life. For a desired service life, load models and tests or calculations can be used to determine how large a maximum abrasion is over a service life if it is subjected to operational loads. The layer is then made with a corresponding thickness, preferably depending on the position, of different thicknesses, with a safety margin also being provided in one embodiment. In one embodiment of the carrier body, it can be assumed that the composite reinforcing agent does not directly adjoin the surface of the carrier body, so that a safety surcharge can be dispensed with because the carrier body can, with a high degree of certainty or in terms of production engineering, ensure such excessive abrasion that the composite can intercept -The reinforcing agent does not come into direct contact with the strand to be guided over the service life (or a service life extended by the safety surcharge).

• - Kurzfasermaterial, bevorzugt mit einem Verbund-verstärkten Granulat aus einem thermoplastischen Kunststoff für einen Spritzgussverfahren;
• - Langfasermaterial, bevorzugt mit einem Verbund-verstärkten Prepreg aus einem duroplastischen Kunststoff für ein thermisches Formungsverfahren; und
• - Kugelmaterial.

It is further proposed in an advantageous embodiment of the damper device that the composite reinforced plastic contains at least one of the following composite reinforcing means:

• - Short fiber material, preferably with a composite-reinforced granulate made of a thermoplastic for an injection molding process;
• - Long fiber material, preferably with a composite reinforced prepreg made of a thermosetting plastic for a thermal molding process; and
• - bullet material.

Short fiber material has the advantage that it does not influence a conventional manufacturing process so significantly that it has to be modified. For example, short fiber material can be incorporated into an injection molding process, for example a thermoplastic granulate is provided with short fiber material.

Long fiber material has the advantage that particularly large stiffening effects can be achieved. This is particularly advantageous in the case of well-known unidirectional and / or bidirectional load cases if the long fibers are aligned in accordance with the load case, so that they are then subjected to tension. Long fiber material can be processed particularly well industrially as a prepreg. The prepreg is not only impregnated with a thermoset, for example an epoxy resin, but also and particularly advantageously preforms, for example BMC (Bulk Molding Compound), comprises which the final shape is preserved and cross-linked in a thermal process. However, organic sheets are also suitable as prepreg, in which, as a rule, short fibers are integrated in a thermoplastic matrix.

In addition or as an alternative, spherical material is suitable, so that the mass of the carrier body can be reduced with the same or only negligibly reduced rigidity.

It is further proposed in an advantageous embodiment of the damper device that in at least one predetermined area of the carrier body with a small number of main load directions, preferably with unidirectional and / or bidirectional main load direction, at least one long fiber and / or at least one stitch-free fiber mat corresponding to the at least one main load direction are aligned.

In one embodiment, the at least one long fiber or the stitch-free (or directional) fiber mat is coordinated, that is to say oriented in a load-dependent manner, before the plastic is injected or poured into the injection mold. The plastic is then injected. The at least one long fiber or the fiber mat is preferably not yet impregnated, for example loosely inserted into the injection mold or at least partially glued in place.

Alternatively, the at least one long fiber or the stitch-free (or directional) fiber mat is only applied after a semifinished support body has been formed, with the at least one separate layer preferably already being applied to the semifinished support body.

In a further embodiment, the areas are inserted as a prefabricated semifinished product in an injection mold and are subsequently encapsulated in a thermoplastic plastic to form the carrier body or encapsulated in a thermosetting plastic.

1. a. Bereitstellen einer Spritzgussform;
2. b. in den vorbestimmten Bereichen, Einlegen von Langfasern und/oder maschenfreie Fasermatten in die Spritzgussform;
3. c. Einspritzen eines Kunststoffs; und
4. d. Entformen der fertiggestellten Dämpfereinrichtung.

According to a further aspect, an injection molding method for producing a damper device according to an embodiment as described above is proposed, the injection molding method comprising at least the following steps:

1. a. Providing an injection mold;
2. b. in the predetermined areas, inserting long fibers and / or stitch-free fiber mats into the injection mold;
3. c. Injecting a plastic; and
4. d. Demoulding of the completed damper device.

The method proposed here is carried out, for example, according to an embodiment according to the preceding description, so that reference is made to the corresponding description. The injection mold is formed, for example, from a metal, for example from steel or aluminum, for large quantities and / or manufacturing accuracy. The injection mold is preferably designed without inclusions, that is to say without a lost mold. The injection mold is for holding in step b. inserted long fibers and / or mesh-free (or directional) fiber mats, for example by means of a form-fitting insertion area, magnets or adhesive points, by means of which the insert material is held securely positioned.

A single injection mold can preferably be used for a damper device with two carrier bodies, that is to say two identical carrier bodies are formed for a damper device, which are connected to one another in use, preferably in a form-fitting manner.

The injection mold is preferably designed in such a way that the carrier body can be easily removed, at least after cooling, preferably still hot. In one embodiment, the injection mold is forcibly cooled.

It is further proposed in an advantageous embodiment of the injection molding process that the injection in step c. is a multi-component injection molding process, in which the at least one sliding surface and / or the bearing surface is injection-molded from a compound-free granulate and the carrier body from a compound-reinforced granulate.

In this embodiment, the injection mold in step d. the completed damper device or a completed half of the damper device can be removed.

1. i. Aufbringen zumindest einer der separaten Schichten; und
2. ii. in vorbestimmten Bereichen, Aufbringen von Langfasern und/oder maschenfreien Fasermatten, welche entsprechend den Hauptlastrichtungen ausgerichtet sind.

According to a further aspect, a manufacturing method for manufacturing a damper device according to an embodiment according to the above description is proposed, at least one carrier body being produced and the manufacturing method subsequently comprising at least one of the following steps:

1. i. Applying at least one of the separate layers; and
2. ii. in predetermined areas, application of long fibers and / or stitch-free fiber mats, which are aligned in accordance with the main load directions.

The method proposed here is also carried out, for example, according to an embodiment according to the preceding description, so that reference is made to the corresponding description.

In this manufacturing process, the at least one separate layer, the long fibers and / or the stitch-free (or directional) fiber mats are applied only after the carrier body has been finished. In one embodiment, the separate layers are first applied, for example in a multi-component injection molding process, for example as described above, wherein preferably no long fibers and no fiber mats have been introduced into the injection mold. The long fibers and / or the stitch-free (or directional) fiber mats are then applied in predetermined areas as described above.

In an alternative embodiment, the carrier body is formed from a preform, for example a BMC. The at least one separate layer, the long fibers and / or the stitch-free (or directional) fiber mats are then applied.

It is further proposed in an advantageous embodiment of the manufacturing method that the step i. separate layer to be applied is formed by means of dip coating.

In this embodiment, the at least one separate layer is applied as a dip coating. The long fibers and / or mesh-free fiber mats are preferably already applied to the carrier body in the predetermined regions, and are particularly preferably connected to the carrier body in a solidified manner.

• - eine Getriebeeingangswelle mit einem ersten Kegelscheibenpaar;
• - eine Getriebeausgangswelle mit einem zweiten Kegelscheibenpaar;
• - ein Umschlingungsmittel, mittels welchem das erste Kegelscheibenpaar mit dem zweiten Kegelscheibenpaar drehmomentübertragend verbunden ist;
• - zumindest eine Dämpfereinrichtung nach einer Ausführungsform gemäß der obigen Beschreibung, wobei die zumindest eine Dämpfereinrichtung zum Dämpfen des Umschlingungsmittels mit der zumindest einen Gleitfläche an dem Umschlingungsmittel anliegt.

According to a further aspect, a belt transmission for a drive train is proposed, comprising at least the following components:

• - A transmission input shaft with a first pair of conical disks;
• - A transmission output shaft with a second pair of conical pulleys;
• - A belt means by means of which the first pair of conical disks is connected to the second pair of conical disks in a torque-transmitting manner;
• - At least one damper device according to an embodiment according to the above description, wherein the at least one damper device for damping the belt means with the at least one sliding surface on the belt means.

With the belt transmission proposed here, a torque can be transmitted from a transmission input shaft to a transmission output shaft, and vice versa, in a step-up or step-down manner, the transmission being continuously adjustable, at least in some areas. A belt transmission is designed, for example, as shown at the beginning and the damper device fulfills the task explained at the outset.

The components of the belt transmission are usually enclosed and / or supported by a gear housing. For example, the swivel bearing for the swivel means receptacle is fastened to the gear housing as a holding tube and / or is movably mounted. The input shaft and the output shaft extend from outside into the gear housing and are preferably supported on the gear housing by means of bearings. The conical disk pairs are enclosed by means of the gear housing, and the gear housing preferably forms the abutment for the axial actuation of the movable conical disks. Furthermore, the transmission housing preferably forms connections for fastening the belt transmission and for example for the supply with hydraulic fluid. For this purpose, the gear housing has a variety of boundary conditions and must fit into a given installation space. This interaction creates an inner wall that limits the shape and movement of the components. This represents the decisive limitation for the swiveling damper device, so that the shape to achieve the best possible damping property must be constructed on the basis of the gear housing or its inner wall.

The belt transmission proposed here has one or two damper devices, of which at least one damper device according to the above description has a particularly high rigidity with a low wear effect on the belt means and / or the pivoting means. This is achieved by means of the at least one separate layer on at least one of the sliding surfaces or the bearing surface.

According to a further aspect, a drive train is proposed, at least having a drive unit each with an output shaft, at least one consumer and a belt transmission according to an embodiment according to the above description, wherein at least one of the output shafts for torque transmission by means of the belt transmission can be connected to the at least one consumer with variable translation.

The drive train is set up to transmit a torque provided by a drive unit, for example an internal combustion engine and / or an electrical machine, and output via its drive shaft, for example, the combustion shaft and / or the (electrical) rotor shaft, for use as required, So taking into account the required speed and torque. One use is, for example, an electrical generator for providing electrical energy or the transmission of a torque to a drive wheel of a motor vehicle to propel it.

In order to transmit the torque in a targeted manner and / or by means of a manual transmission with different gear ratios, the use of the belt transmission described above is particularly advantageous because a large gear ratio spread can be achieved in a small space and the drive unit can be operated with a small optimal speed range. Conversely, it is also possible to record an inertia energy from, for example, a drive wheel, which then forms a drive unit in the above definition, by means of the belt transmission on an electric generator for recuperation (the electrical storage of braking energy) with a correspondingly configured torque transmission line. Furthermore, in a preferred embodiment, a plurality of drive units are provided, which can be operated in series or in parallel or decoupled from one another and whose torque can be made available as required by means of a belt transmission as described above. An application example is a hybrid drive train, comprising an electric drive machine and an internal combustion engine.

The belt transmission proposed here enables the use of a damper device that uses the available space efficiently, so that very good damping properties can be achieved due to an increase in rigidity. The noise emissions of such a drive train are thus reduced. The efficiency can also be increased as a result of a reduction in the vibrations. By means of the at least one separate layer, a small amount of wear on the belt means and / or the swivel means can be achieved at the same time and the life of the belt transmission can thus be extended.

According to a further aspect, a motor vehicle is proposed, comprising at least one drive wheel which can be driven by means of a drive train according to an embodiment as described above.

Most motor vehicles today have a front-wheel drive and partially arrange the drive unit, for example an internal combustion engine and / or an electrical machine, in front of the driver's cab and transversely to the main direction of travel. The radial installation space is particularly small in such an arrangement and it is therefore particularly advantageous to use a small-sized belt transmission. The use of a belt transmission in motorized two-wheelers is similar, for which in comparison to previously known two-wheelers, increased performance is always required with the same installation space. With the hybridization of the drive trains, this problem is exacerbated for rear axle arrangements, and also here both in the longitudinal arrangement and in the transverse arrangement of the drive machines.

In the motor vehicle proposed here with the drive train described above, low noise emission is achieved, which means that less effort is required with regard to sound insulation. This means that less space is required for the belt transmission. It is also possible, as an alternative or in addition, to set up low noise emissions and a long service life.

• 1: in perspektivischer Ansicht eine Hälfte einer Dämpfervorrichtung;
• 2: in perspektivischer Ansicht einen Trägerkörper;
• 3: in perspektivischer Ansicht eine Hälfte einer Dämpfervorrichtung mit Beschichtung;
• 4: ein Umschlingungsgetriebe mit einem mittels Gleitschiene geführten Trum; und
• 5: ein Antriebsstrang in einem Kraftfahrzeug mit Umschlingungsgetriebe.

The invention described above is explained in detail below against the relevant technical background with reference to the accompanying drawings, which show preferred configurations. The invention is in no way limited by the purely schematic drawings, it being noted that the drawings are not true to size and are not suitable for defining size relationships. It is shown in

• 1 : a perspective view of one half of a damper device;
• 2nd : a carrier body in perspective view;
• 3rd : a perspective view of one half of a damper device with coating;
• 4th : a belt transmission with a run guided by a slide rail; and
• 5 : a drive train in a motor vehicle with a belt transmission.

In 1 is (one half) a damper device 1 shown in a perspective view, wherein the second half is preferably formed identically with that shown. Correspondingly, the volume of the skin forms the first carrier body 8th (the first half) or the second carrier body 9 (the second half). The damper device shown 1 is here as a slide rail with an inner slide surface 4th and an outer sliding surface 5 executed. In the direction of travel 36 behind the damper device 1 , i.e. on the outlet side 40 A (co-moving) Cartesian coordinate system is shown, the transverse direction being shown in the illustration 37 perpendicular and the axial direction 38 is aligned transversely. The inlet side is opposite in the direction of travel 39 shown. At the bottom of the illustration, i.e. transversely on the inside, is a (half of a) swivel mount with the bearing surface 6 to recognize their function in connection with 4th becomes clear. The storage area 6 is divided into a swivel partial storage area 52 radially towards a pivoting means 7 (compare 4th ) and an axial partial bearing surface 53 axially towards an axial bearing surface, for example an axial flange of a pivoting means 7 . The two sliding surfaces 4th and 5 each consist of a portion of both halves of the damper device 1 together. The two sliding surfaces 4th and 5 are by means of the transverse bridge 10th mechanically spaced apart from each other. The inner sliding surface 4th is from a first separate layer 11 and the outer sliding surface 5 from a second separate layer 12 educated. The storage area 6 is from a third separate layer 13 educated. The first separate layer 11 is in its middle part, i.e. outside of an inlet and an outlet, with a first thickness 14 executed and so is the second separate layer 12 in its middle part, i.e. outside of an inlet and an outlet, with a second thickness 15 executed. Furthermore, the storage area 6 at least in the area of the main load with a third thickness 16 executed what here pars-pro-toto on the axial partial bearing surface 53 is displayed. Irrespective of this, for example also in the embodiment according to 2nd and 3rd is provided, is in the first area on the outlet side 40 on the back, i.e. transversely within the inner sliding surface 4th a predetermined first area 17th and on the back, i.e. transversely outside, the outer sliding surface 5 a predetermined second area 18th reinforced with a long fiber reinforcement, for example rovings or a knitted fabric, against a first main load direction 20th or a second main load direction 21st , which is a bending movement around the axial direction 38 and / or around the direction of travel 36 corresponds. In one embodiment, in addition or alone is on the inlet side 39 a corresponding reinforcement is provided in predetermined areas. Furthermore, alternatively or additionally there is a predetermined third area 19th with the same or a different kind of long fiber reinforcement against a bending movement around the running direction 36 , i.e. a third main load direction shown here as a moment 22 provided, i.e. inside the transverse web 10th .

In 2nd is a carrier body 8th or 9 in a similar embodiment as in 1 shown shown, the carrier body 8th or 9 has no sliding surfaces and no bearing surface and no separate layers. For explanation, reference is made to the preceding description. The support body shown 8th , 9 is formed, for example, in one step without insert components, for example from a BMC prepreg.

In 3rd is now (half of) the damper device 1 shown in the final state, here now a (here completely enclosing) coating 35 is applied. This coating forms the sliding surfaces 4th and 5 , as well as the storage area 6 out.

In 4th is a schematic of a damper device 1 in a belt transmission 3rd shown, with a first strand 41 of a belt 2nd by means of the damper device 1 is guided and thus dampened. The belt 2nd connects a pair of conical disks on the input side to transmit torque 25th with a pair of conical disks on the output side 26 . On the pair of conical disks on the input side 25th , which here, for example, with a transmission input shaft 24th about an axis of rotation on the input side 47 rotatably connected to transmit torque, lies in the axial direction by appropriate spacing 38 (corresponds to the orientation of the axes of rotation 47 , 48 ) an active circuit on the input side 50 on which the belt 2nd expires. On the pair of conical disks on the output side 26 , which here, for example, with a transmission output shaft 27 about an axis of rotation on the output side 48 rotatably connected to transmit torque, lies in the axial direction by appropriate spacing 38 an active circuit on the output side 51 on which the belt 2nd expires. The (changeable) ratio of the two circles 50 , 51 and gives the gear ratio between the transmission input shaft 24th and the transmission output shaft 27 .

Between the two pairs of conical disks 25th , 26 are the first (run here) 41 and the second strand 42 shown in an ideal tangential alignment, so that the parallel alignment of the running direction 36 sets. The transverse direction shown here 37 is perpendicular to the running direction 36 and perpendicular to the axial direction 38 is defined as the third spatial axis, which is to be understood as a coordinate system that moves (depending on the active circle). Therefore, the one shown applies Running direction 36 as well as the transverse direction 37 only for the damper device shown (here designed as a slide rail) 1 and the first run 41 , and only in the case of the set active circuit shown on the input side 50 and corresponding output circuit 51 .

The damper device designed as a slide rail 1 lies with its inner sliding surface 4th and their by means of the (right) transverse bridge 10th associated outer sliding surface 5 on the first run 41 of the belt 2nd at. So that the sliding surfaces 4th , 5 the changing tangential orientation, i.e. the running direction 36 , when changing the active circles 50 , 51 and can follow is the storage area 6 on a swivel 7 with a swivel axis 43 , for example, a conventional holding tube. This makes the damper device 1 about the pivot axis 43 pivoted. In the exemplary embodiment shown, the swiveling movement is composed of a superimposition of a pure angular movement and a transverse movement, so that, in deviation from a movement along a circular path, a movement along an oval (steeper) curved path occurs.

• - die Umlaufrichtung 49 und die Laufrichtung 36 sind bei Drehmomenteingang über das eingangsseitige Kegelscheibenpaar 25 umgekehrt; oder
• - die Getriebeausgangswelle 27 und die Getriebeeingangswelle 24 sind vertauscht, sodass das ausgangsseitige Kegelscheibenpaar 26 den Drehmomenteingang bildet.

In the direction of rotation shown as an example 49 and with torque input via the transmission input shaft 24th forms the damper device 1 in the illustration on the left the inlet side 39 and the outlet side on the right 40 out. The first run 41 In a version as a traction mechanism drive then forms the load strand as the pull strand and the second strand 42 the empty strand. When executing the belt 2nd as a thrust link belt, under otherwise identical conditions, is either the first run 41 as an empty strand by means of the damper device 1 led or the first run 41 is designed as a load strand and push strand and:

• - the direction of rotation 49 and the direction of travel 36 are at torque input via the conical disk pair on the input side 25th vice versa; or
• - the transmission output shaft 27 and the transmission input shaft 24th are reversed so that the pair of conical disks on the output side 26 forms the torque input.

In 5 is a powertrain 23 in a motor vehicle 32 with its motor axis 46 (optional) across the longitudinal axis 45 (optional) in front of the driver's cabin 44 arranged. Here is the belt transmission 3rd on the input side with the electric output shaft 30th of the electric drive unit 28 and with the combustion output shaft 31 of the electric drive unit 29 connected. Of these drive units 28 , 29 or via their output shafts 30th , 31 becomes a torque for the drive train at the same time or at different times 23 submitted. But it is also a torque from at least one of the drive units 28 , 29 recordable, for example by means of the internal combustion engine for engine braking and / or by means of the electric drive machine for recuperation of braking energy. The belt transmission is on the output side 3rd connected to a purely schematic output, so that here a left drive wheel 33 and a right drive wheel 34 (Consumers) with a torque from the drive units 28 , 29 can be supplied with changeable translation.

With the slide rail proposed here, cost-effective production with high rigidity and a long achievable service life can be achieved.

Reference symbol list

1

Damper device

2nd

Strap

3rd

Belt transmission

4th

inner sliding surface

5

outer sliding surface

6

storage area

7

Swivel means

8th

first carrier body

9

second carrier body

10th

Transverse bridge

11

first layer

12

second layer

13

third layer

14

first thickness

15

second thickness

16

third thickness

17th

first area

18th

second area

19th

third area

20th

first main load direction

21st

second main load direction

22

third main load direction

23

Hybrid drivetrain

24th

Transmission input shaft

25th

pair of conical disks on the input side

26

pair of conical disks on the output side

27

Transmission output shaft

28

Electric drive unit

29

Combustion drive unit

30th

Electric output shaft

31

Combustion output shaft

32

Hybrid motor vehicle

33

left drive wheel

34

right drive wheel

35

Coating

36

Running direction

37

Transverse direction

38

Axial direction

39

Inlet side

40

Outlet side

41

first run

42

second run

43

Swivel axis

44

Driver's cabin

45

Longitudinal axis

46

Motor axis

47

rotational axis on the input side

48

output axis of rotation

49

Orbital direction

50

active side input circuit

51

output-side active circuit

52

Part swivel storage area

53

Axial partial storage area

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 10017005 A1 [0002]
• WO 2014/012741 A1 [0002]

Claims (10)

Damper device (1) for a belt means (2) of a belt transmission (3), comprising at least the following components: - at least one sliding surface (4, 5); - A bearing surface (6) for a pivoting means (7); and - at least one carrier body (8,9), the at least one sliding surface (4,5) and the bearing surface (6) each forming part of a surface of the at least one carrier body (8,9), characterized in that only the at least one a carrier body (8,9) is formed from a composite reinforced plastic. Damper device (1) after Claim 1 , wherein the at least one carrier body (8,9) is formed from a composite reinforced plastic, and wherein the at least one sliding surface (4,5) and / or the bearing surface (6) each have a separate layer (11,12,13 ) are formed, preferably at least one of the separate layers (11, 12, 13) being formed without composite reinforcement. Damper device (1) after Claim 2 , wherein the respective separate layer (11, 12, 13) is produced by means of one of the following methods: - as a step of a multi-component injection molding method, in a common injection mold in another step the at least one carrier body (8,9) is generated; - As a coating (35) on the at least one carrier body (8, 9) formed; and - as a separate component which is mechanically connected to the at least one carrier body (8, 9). Damper device (1) after Claim 2 or 3rd , the separate layer (11, 12, 13) being formed from a low-friction, preferably self-lubricating, material, and preferably the separate layer (11, 12, 13) having a thickness (14, 15, 16). Damper device (1) according to one of the preceding claims, wherein the composite-reinforced plastic contains at least one of the following composite reinforcing means: - Short fiber material, preferably with a composite-reinforced granulate made of a thermoplastic material for an injection molding process; - Long fiber material, preferably with a composite reinforced prepreg made of a thermosetting plastic for a thermal molding process; and - bullet material. Damping device (1) according to one of the preceding claims, wherein in at least one predetermined area (17, 18, 19) of the carrier body (8, 9) with a small number of main load directions (20, 21, 22), preferably with unidirectional and / or bidirectional main load direction (20, 21, 22), at least one long fiber and / or at least one mesh-free fiber mat are used in accordance with the at least one main load direction (20, 21, 22). Injection molding process for producing a damper device (1) Claim 6 wherein the injection molding process comprises at least the following steps: a. Providing an injection mold; b. in the predetermined areas (17, 18, 19), inserting long fibers and / or mesh-free fiber mats into the injection mold; c. Injecting a plastic; and d. Demoulding of the completed damper device (1). Injection molding process after Claim 7 , the injection in step c. is a multi-component injection molding process in which the at least one sliding surface (4, 5) and / or the bearing surface (6) is injection-molded from a compound-free granulate and the carrier body (8, 9) is injection-molded from a compound-reinforced granulate. Manufacturing method for producing a damper device (1) according to one of the Claims 2 to 6 , at least one carrier body (8, 9) being produced and the manufacturing method subsequently comprising at least one of the following steps: i. Applying at least one of the separate layers (11, 12, 13); and ii. in predetermined areas (17, 18, 19), application of long fibers and / or mesh-free fiber mats, which are aligned in accordance with the main load directions (20, 21, 22). Manufacturing process according to Claim 9 , wherein the in step i. separate layer (11, 12, 13) to be applied is formed by means of dip coating.

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